While I could swear that it worked yesterday

...to revert a206bc22 "avoid warnings about
deprecated decls. from glib2" in my Fedora 18 environment, it /does/ fail now
post 98ba9ca0 "Revert 'avoid warnings about
deprecated decls. from glib2.'"

Change-Id: I42d118c06665c976a26a2dbfedc31ca4c8bcf0cc

vcl/inc/unx/gtk/gtkdata.hxx

@@ -21,6 +21,7 @@
 #define _VCL_GTKDATA_HXX
 
 #include <prex.h>
+#define GLIB_DISABLE_DEPRECATION_WARNINGS
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>